russia's foreign minister accused the west of plotting to control ukraine. ukraine's prime minister said the russians want to start another world war. russian troops are conducting exercises near the border. some fear it is a prelude to an invasion. we have a team of correspondents on this. first, major garrett, who is traveling with the president in south korea tonight. major? >> reporter: scott, the president, president obama, held a conference call with the leaders of germany, france, great britain, and italy about hitting key sectors of the russian economy, like energy and banking, with new sanctions. the consensus along the leaders at least for now is to wait, but today the president said this: >> what we've been trying to do is to continually raise the costs for russia of their actions while still leaving the possibility of them moving in a different direction, and we-- you know, we'll continue to keep some arrows in our quiver in the event that we see further deterioration of the situation over the next several days or weeks. >> reporter: while the u.